Google Nest Protect Smart Smoke / Carbon Monoxide Alarm

Nest Protect

The smoke alarm that thinks, speaks, and alerts your phone.

It’s time to expect more from your smoke alarm.

Nest Protect has been redesigned from the inside out. It has a Split-Spectrum Sensor, tests itself automatically, and lasts up to a decade. It’s also the first home alarm you can hush from your phone without any extra hardware required. And it tells you what’s wrong and can even alert your phone.

10-year CO sensor.

Carbon monoxide is poisonous but you can’t see it or smell it. That’s why Nest Protect has the most accurate type of carbon monoxide sensor available. We also improved our carbon monoxide sensing algorithm. And we’ll keep working to make it better and better because people depend on it.

Thoughtful, not annoying


  • Tests itself

    You’re supposed to test smoke alarms monthly. But 9 out of 10 people don’t. So Nest Protect checks its batteries and sensors over 400 times a day. And it’s the first alarm that uses Sound Check to quietly test its speaker and horn once a month.


  • Lights your way

    If you need a glass of milk in the middle of the night, Nest Protect lights up as you walk underneath it. Pathlight is one of our customers’ favorite features so we made it better and brighter.


  • Steam is not smoke

    Has your alarm ever yelled at you for taking a shower? Nest Protect is the only alarm with Steam Check. It uses custom algorithms and a humidity sensor to look for steam, so you can enjoy a nice, quiet shower.

This is going to be easy.

You can set up your Nest Protect in just minutes using your iPhone, iPad, or Android device. And Nest Protect is now even easier to install. But if you need help, we have customer support with real humans to answer your questions.

$119.99

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